right angle

noun
the angle formed by two radii of a circle that are drawn to the extremities of an arc equal to one quarter of the circle; the angle formed by two perpendicular lines that intersect; an angle of 90°.
Origin of right angle
Middle English word dating back to 1350–1400
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for right angle
Contemporary Examples of right angle
Historical Examples of right angle
Obtuse, an angle having a wider opening than a rightangle or "perpendicular."
Stained Glass WorkC. W. Whall
At the epicentre, the angle of emergence is a rightangle; at a great distance from the epicentre, it is nearly zero.
A Study of Recent EarthquakesCharles Davison
Its bole, five feet of stalwart diameter, rose straight and tapering to the first rightangle limbs, each in itself almost a tree.
The Roof TreeCharles Neville Buck
At length he rose and climbed on, presently turning at a rightangle to bisect the strip to its boundary before he paused to rest.
The Valiants of VirginiaHallie Erminie Rives
The toe is never pointed in line with the leg, but held at a rightangle to it, as in the standing position.
The Morris BookCecil J. Sharp
right angle
noun
Collins English Dictionary  Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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right angle
[rīt]
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
right angle
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.